Competency tests for teachers in Texas are constitutional and should not be delayed, a judge ruled in Austin. State District Judge Harley Clark ruled that the required test of reading and writing for teachers and administrators is in line with public school reforms legislated in 1984. The Texas Education Agency is to test 210,000 public school administrators and teachers on Monday. Math and science teachers are not included. Those who fail and do not pass a make-up exam in June will lose their teaching certificates. The Texas State Teachers Assn. had challenged the testing, saying school boards should decide competency.